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Matching design method for isomorphic parabolic type taper-leaf spring pre-clamping stress

A parabola and variable cross-section technology, which is applied in the design characteristics of spring/shock absorber, leaf spring, computer-aided design, etc., can solve the problems that cannot meet the requirements of the suspension with few leaf springs of variable cross-section, and the lack of accurate and reliable constructions. Parabolic variable-section leaf springs and other problems, to achieve the effect of reducing design and test costs, improving the design level, and speeding up the development speed

Inactive Publication Date: 2018-09-28
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the information obtained, there has been no accurate and reliable matching design method for the pre-clamping stress of equal-construction parabolic variable-section leaf springs with few pieces of parabola, which cannot meet the rapid development of vehicles and the suspension of small-piece variable-section leaf springs. Requirements for Modern CAD Design

Method used

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  • Matching design method for isomorphic parabolic type taper-leaf spring pre-clamping stress
  • Matching design method for isomorphic parabolic type taper-leaf spring pre-clamping stress
  • Matching design method for isomorphic parabolic type taper-leaf spring pre-clamping stress

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment one: the width b=60mm of a certain constructional formula few parabolic variable-section leaf springs, half of the span L T =570mm, half the length L of the straight section of the root clamped by the saddle bolt 0 = 50mm. The number of leaf springs n=3, the thickness h of the straight section at the root of each leaf spring 2 =18mm. Rated load P N = 16000N, the allowable stress of the first leaf spring under rated load [σ 1 ]=400MPa. According to the number of leaf springs, structural parameters, rated load and the allowable stress of the first leaf spring under the rated load, the pre-clamping stress of each leaf spring of the less-parabolic variable-section leaf spring of the same structure is matched. design.

[0022] The matching design method of the pre-clamping stress of the equal-structure few-piece parabolic variable-section leaf spring provided by the example of the present invention, its matching design process is as follows figure 1 As show...

Embodiment 2

[0035] Embodiment two: the width b=60mm of a few pieces of parabolic variable-section leaf spring of a certain construction formula, half span L T =570mm, half the length L of the straight section at the root 0 = 50mm. The number of leaf springs n=4, the thickness h of the straight section at the root of each leaf spring 2 = 16 mm. Rated load P N =16800N, the allowable stress of the first leaf spring under rated load [σ 1 ]=400MPa. According to the number of leaf springs, structural parameters, rated load and the allowable stress of the first leaf spring under the rated load, pre-clamp each leaf spring of the structure with a small number of parabolic variable-section leaf springs Stress matching design.

[0036] Using the same design method and steps as in Embodiment 1, the free tangent arc heights of each leaf spring of the few-sheet parabolic variable-section leaf springs of such structures are designed, and the specific design steps are as follows:

[0037] (1) The ...

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Abstract

The invention relates to a matching design method for isomorphic parabolic type taper-leaf spring pre-clamping stress, and belongs to the technical field of suspension taper-leaf springs. According tothe matching design method, according to the number of leaf springs, the structure parameters, the rated load and the allowable stress of the first leaf spring under the rated load, matching design is carried out on the pre-clamping stress of each leaf spring of the isomorphic parabolic type taper-leaf spring. Through a prototype test, the matching design method for the isomorphic parabola type taper-leaf spring pre-clamping stress can be proved to be accurate, a reliable technical method is provided for the matching design of the pre-clamping stress of each leaf spring, and a reliable technical foundation is laid for the design of the free tangent arc height of each leaf spring. By using the method, the pre-clamping stress of each leaf spring can be ensured to meet the design requirements, the design level and the reliability of a product are improved, the service life of the product is prolonged, and the driving safety of a vehicle is improved; and meanwhile, the design cost and test cost of the product are reduced, and the product development speed is increased.

Description

technical field [0001] The invention relates to a small-piece variable-section leaf spring for a vehicle suspension, in particular to a matching design method for the pre-clamping stress of a small-piece parabolic variable-section leaf spring of an equal configuration. Background technique [0002] With the implementation of automobile energy-saving and lightweight policies, leaf springs with small variable cross-sections are increasingly popular in vehicle suspension due to their advantages of light weight, high material utilization, no or small friction between sheets, low vibration and noise, and long service life. Experts, manufacturers and vehicle manufacturers have paid close attention to it, and it has been widely used in vehicle suspension systems. Among them, the most widely used is the equal-structure few-piece parabolic variable-section leaf spring. Usually, in order to meet the design requirements of the clamping stiffness characteristics of the leaf spring, impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F3/02F16F1/18G06F17/50
CPCF16F1/187F16F3/023F16F2226/04F16F2228/06F16F2230/0082F16F2230/40F16F2238/02G06F30/15G06F30/17G06F30/20G06F2119/06
Inventor 周长城于曰伟赵雷雷汪晓杨腾飞杨铖兆朱召辉张云山毛少坊
Owner SHANDONG UNIV OF TECH
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